Panic with recent -CURRENT kernel in EC2

[Colin Percival]

This sounds like it may be related to r327031, which make ixgbe (and thus ixv)
use iflib... maybe erj@ will have some ideas here?

In case it helps, dhclient sets the MTU, which in the past has caused
problems due to drivers resetting -- the fact that sys_ioctl is ending
up in iflib_init_locked makes me wonder if this is a similar issue.  (If
it is, there's a locking problem somewhere...)

Colin Percival

On 01/12/18 01:23, Bradley T. Hughes wrote:
> (Cross-posting to -net, but I'm not subscribed there... yet)
> 
> I was wondering if anyone else has experienced this panic when dhclient
tries to get an IP address after booting a recent 12.0-CURRENT kernel? Using
the 12.0-CURRENT AMI from early November works, but with the latest snapshot
or when using a kernel built from source I get this:
> 
> ixv0: <Intel(R) PRO/10GbE Virtual Function Network Driver> mem 0xf3000000-0xf3003fff,0xf3004000-0xf3007fff at device 3.0 on pci0
> ixv0: using 2048 tx descriptors and 2048 rx descriptors
> ixv0: msix_init qsets capped at 1
> ixv0: pxm cpus: 2 queue msgs: 2 admincnt: 1
> ixv0: using 1 rx queues 1 tx queues 
> ixv0: Using MSIX interrupts with 2 vectors
> ixv0: allocated for 1 queues
> ixv0: allocated for 1 rx queues
> taskqgroup_attach_cpu: setaffinity failed: 22
> taskqgroup_attach_cpu: setaffinity failed: 22
> ixv0: Ethernet address: 0a:ad:68:70:ea:78
> ixv0: netmap queues/slots: TX 1/2048, RX 1/2048
> ...
> panic: Assertion if_getdrvflags(ifp) == i failed at /usr/src/sys/net/iflib.c:2199
> cpuid = 3
> time = 1515673176
> KDB: stack backtrace:
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe008a8ee600
> vpanic() at vpanic+0x19c/frame 0xfffffe008a8ee680
> kassert_panic() at kassert_panic+0x126/frame 0xfffffe008a8ee6f0
> iflib_init_locked() at iflib_init_locked+0x75f/frame 0xfffffe008a8ee750
> iflib_if_ioctl() at iflib_if_ioctl+0x744/frame 0xfffffe008a8ee7b0
> ifioctl() at ifioctl+0x1903/frame 0xfffffe008a8ee850
> kern_ioctl() at kern_ioctl+0x2c4/frame 0xfffffe008a8ee8b0
> sys_ioctl() at sys_ioctl+0x15c/frame 0xfffffe008a8ee980
> amd64_syscall() at amd64_syscall+0x79b/frame 0xfffffe008a8eeab0
> Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe008a8eeab0
> --- syscall (54, FreeBSD ELF64, sys_ioctl), rip = 0x80100a4fa, rsp = 0x7fffffffe408, rbp = 0x7fffffffe460 ---
> 
> Thanks in advance :)

-- 
Colin Percival
Security Officer Emeritus, FreeBSD | The power to serve
Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid